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The US State Department has confirmed that Australia’s future fleet of conventionally armed, nuclear-powered attack submarines being jointly developed with the United Kingdom and the United States under Pillar 1 of the AUKUS framework will field a vertical launch system (VLS) capability.
The UK government has formally sought extensive technical assistance from the US to support the design and development of key systems underpinning the AUKUS nuclear-powered submarine program, in a deal now valued at around US$1 billion (approximately AU$1.42 billion).
The request significantly expands an earlier foreign military sale (FMS) case worth US$50 million (AU$71.6 million), reflecting the growing scale and complexity of the trilateral AUKUS effort involving the UK, the US and Australia.
At the heart of the expanded package is support for advanced submarine combat system architecture, including AUKUS-specific vertical launch tubes, common weapon launchers and modular support systems for all-up-round canisters. The request also covers network input/output units, servers, switches and bespoke electronics integral to a federated tactical warfare system.
In addition, the UK is seeking simulation systems, engineering demonstration models and specialised testing and installation equipment, alongside IT hardware, software, source code and technical documentation. The package also includes personnel training, facility support and embedded US and UK staff working across both countries to assist with submarine design and integration.
Broader support services form a substantial component of the deal, encompassing US government and contractor-led engineering, logistics and technical assistance, as well as test and trials support, studies, surveys and ongoing program management.
The original FMS case focused on non-recurring engineering, integration of US systems into a next-generation submarine design, and early-stage combat and weapons system support for what will become a future class of nuclear-powered attack submarines for both the Royal Navy and the Royal Australian Navy.
According to US officials, the expanded sale aligns with Washington’s broader strategic objectives by strengthening the capability of a key NATO ally. The UK’s enhanced submarine capability is expected to bolster deterrence, protect critical maritime infrastructure and contribute to stability across north-western Europe.
The US State Department stated that the “package is not expected to shift the regional military balance” but rather reinforce existing allied capabilities and interoperability.
Major US defence primes set to benefit from the deal include Huntington Ingalls Industries, General Dynamics Electric Boat, General Dynamics Mission Systems, Progeny Systems, Lockheed Martin, and Systems Planning and Analysis.
The move underscores the accelerating pace of AUKUS Pillar I, as the three partner nations deepen industrial integration and push towards delivering a new generation of nuclear-powered submarines over the coming decades.
Stephen Kuper
Steve has an extensive career across government, defence industry and advocacy, having previously worked for cabinet ministers at both Federal and State levels.
